John Voelcker Apr 26, 2017 Follow John Add to circle Tesla Model S at Supercharger site in Ventura, CA, with just one slot open [photo: David Noland] Enlarge Photo Tesla continues to make sweeping changes as it prepares for the launch of the Model 3, its first mass-market electric car. The company has announced a significant expansion of its global network of Supercharger DC fast-charging stations. Executives believe, it said, that charging should be “convenient, abundant, and reliable” for all current and future owners. DON’T MISS: Used Tesla Model S values stay higher than expected Today, Tesla provides roughly 5,400 Supercharger charging slots in 840 sites around the world. That figure is to increase to more than 10,000 by the end of the year, according to a blog post published on the company’s official website . Tesla also runs 9,000 Destination Chargers, which let own...